CN113347604A - System, method, equipment and medium for testing vehicle-ground soft switching performance - Google Patents
System, method, equipment and medium for testing vehicle-ground soft switching performance Download PDFInfo
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- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
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Abstract
A system, method, apparatus and medium for testing soft handoff performance of a vehicle. The application provides a test system of soft switching performance in car ground, this system includes mobile unit, first ground equipment, second ground equipment and test equipment. The vehicle-mounted equipment is used for establishing a link with the first ground equipment, simultaneously establishing a link with the second ground equipment by adjusting the analog channel matrix, disconnecting the link with the first ground equipment by adjusting the analog channel matrix after establishing the link with the second ground equipment, and testing the performance of soft handover by the testing equipment according to the information received by the first ground equipment and the second ground equipment. Therefore, the testing of the vehicle-ground soft switching performance can be realized, and the vehicle-ground soft switching performance in different methods is compared and evaluated.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a system, a method, a device, a computer-readable storage medium, and a computer program product for testing a soft handover performance of a vehicle.
Background
The soft handover means that in the handover process, the user maintains a communication link with both the original base station and the new base station, and only after a stable link is established with the new base station, the connection with the old base station is disconnected, so that the reliability of the handover can be effectively improved.
In general, the research on soft handoff between vehicles and ground in the industry is to improve the delay and success rate of soft handoff, but the research on the test of soft handoff between vehicles and ground is relatively deficient. At present, there are various methods that can implement soft handover of wireless communication, but the performance of these soft handover methods cannot be evaluated, and the delay and success rate of the soft handover corresponding to these methods cannot be obtained quickly.
Therefore, a system and a method for testing soft switching performance of a vehicle floor are needed.
Disclosure of Invention
The application provides a test system of soft switching performance in car ground, this system includes mobile unit, first ground equipment, second ground equipment and test equipment. The vehicle-mounted equipment is used for establishing a link with the first ground equipment, simultaneously establishing a link with the second ground equipment by adjusting the analog channel matrix, disconnecting the link with the first ground equipment by adjusting the analog channel matrix after establishing the link with the second ground equipment, and testing the performance of soft handover by the testing equipment according to the information received by the first ground equipment and the second ground equipment. Therefore, the testing of the vehicle-ground soft switching performance can be realized, and the vehicle-ground soft switching performance in different methods is compared and evaluated.
In a first aspect, the present application provides a system for testing soft switching performance of a vehicle, the system comprising: the system comprises vehicle-mounted equipment, first ground equipment, second ground equipment and test equipment;
the vehicle-mounted equipment is used for establishing a second link with the second ground equipment by adjusting the analog channel matrix after establishing the first link with the first ground equipment, and disconnecting the first link by adjusting the analog channel matrix after establishing the second link;
the first ground equipment is used for receiving a first data packet sent by the vehicle-mounted equipment through a first link;
the second ground equipment is used for receiving a second data packet sent by the vehicle-mounted equipment through a second link;
and the test equipment is used for testing the soft handover performance according to the receiving information of the first data packet and the receiving information of the second data packet.
In some possible implementations, the first data packet and the second data packet include a simulation service data packet, and the simulation service data packet has the same structure as the real service data packet.
In some possible implementations, the first surface device is specifically configured to:
when a second link is established between the vehicle-mounted equipment and the second ground equipment, receiving a first data packet sent by the vehicle-mounted equipment through the first link, wherein the receiving time of the first data packet is used for representing the starting time of soft handover;
the second ground device is specifically configured to:
when a first link between the vehicle-mounted equipment and the first ground equipment is disconnected, receiving a second data packet sent by the vehicle-mounted equipment through a second link, wherein the receiving time of the second data packet is used for representing the soft handover completion time;
the soft handover performance includes a handover delay, and the test device is specifically configured to:
and determining the switching time delay according to the receiving time of the first data packet and the receiving time of the second data packet.
In some possible implementations, the soft handover performance includes service delay jitter, and the test device is specifically configured to:
and determining service delay jitter according to the receiving time of two adjacent data packets.
In some possible implementations, the first and second ground devices are located in the same communications zone.
In some possible implementations, the first and second ground devices are located in different communication zones.
In some possible implementations, the frequency of the first link and the frequency of the second link are different.
In a second aspect, the present application provides a method for testing performance of soft handoff between a vehicle and a ground, the method comprising:
after establishing a first link with first ground equipment, the vehicle-mounted equipment establishes a second link with second ground equipment by adjusting the analog channel matrix, and after establishing the second link, the vehicle-mounted equipment disconnects the first link by adjusting the analog channel matrix;
the method comprises the steps that first ground equipment receives a first data packet sent by vehicle-mounted equipment through a first link;
the second ground device receives a second data packet sent by the vehicle-mounted device through a second link;
and the test equipment tests the performance of the soft handover according to the receiving information of the first data packet and the receiving information of the second data packet.
In some possible implementations, the first data packet and the second data packet include a simulation service data packet, and the simulation service data packet has the same structure as the real service data packet.
In some possible implementations, the receiving, by the first ground device, the first data packet sent by the vehicle-mounted device through the first link includes:
when the first ground equipment establishes a second link with the second ground equipment, receiving a first data packet sent by the vehicle equipment through the first link, wherein the receiving time of the first data packet is used for representing the starting time of soft handover;
the second data packet sent by the vehicle-mounted device through the second link is received by the second ground device, and the second data packet comprises:
when a first link between the vehicle-mounted equipment and the first ground equipment is disconnected, the second ground equipment receives a second data packet sent by the vehicle-mounted equipment through the second link, and the receiving time of the second data packet is used for representing the soft handover completion time;
the soft handover performance includes a handover delay, and the testing device tests the soft handover performance according to the receiving information of the first data and the receiving information of the second data, including:
and the test equipment determines the switching time delay according to the receiving time of the first data packet and the receiving time of the second data packet.
In some possible implementations, the soft handover performance includes service delay jitter, and the testing device tests the soft handover performance according to the reception information of the first data and the reception information of the second data, where the testing device tests the soft handover performance includes:
and determining service delay jitter according to the receiving time of two adjacent data packets.
In some possible implementations, the first and second ground devices are located in the same communications zone.
In some possible implementations, the first and second ground devices are located in different communication zones.
In some possible implementations, the frequency of the first link and the frequency of the second link are different.
In a third aspect, the present application provides an apparatus comprising a processor and a memory. The processor and the memory communicate with each other. The processor is configured to execute the instructions stored in the memory to cause the apparatus to perform the performance testing method of the soft handoff of the vehicle ground as in the second aspect or any implementation manner of the second aspect.
In a fourth aspect, the present application provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and the instructions instruct a device to perform the method for testing the performance of the soft handoff between the vehicle and the ground according to the second aspect or any implementation manner of the second aspect.
In a fifth aspect, the present application provides a computer program product containing instructions, which when run on an apparatus, causes the apparatus to perform the method for testing the performance of a soft handover between a vehicle and a ground as described in the second aspect or any implementation manner of the second aspect.
The present application can further combine to provide more implementations on the basis of the implementations provided by the above aspects.
According to the technical scheme, the embodiment of the application has the following advantages:
the embodiment of the application provides a system for testing vehicle-ground soft switching performance, which comprises vehicle-mounted equipment, first ground equipment, second ground equipment and testing equipment, wherein after the vehicle-mounted equipment establishes a link with the first ground equipment, a simulation channel matrix is adjusted to enable the vehicle-mounted equipment to simultaneously establish a link with the second ground equipment, and after the link between the vehicle-mounted equipment and the second ground equipment is established, the simulation channel matrix is adjusted to enable the link between the vehicle-mounted equipment and the first ground equipment to be disconnected, and the testing equipment tests the soft switching performance according to information received by the first ground equipment and the second ground equipment, so that the test on the vehicle-ground soft switching performance can be realized, various indexes reflecting the soft switching performance in different methods can be quickly obtained, the vehicle-ground soft switching technologies in the different methods can be compared and evaluated, and the development of the vehicle-ground soft switching technology is facilitated.
Drawings
In order to more clearly illustrate the technical method of the embodiments of the present application, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive labor.
Fig. 1 is a schematic structural diagram of a system for testing soft handoff performance of a vehicle and a ground according to an embodiment of the present disclosure;
fig. 2 is a schematic view of a scene architecture of a system for testing soft handoff performance of a vehicle and a ground according to an embodiment of the present disclosure;
fig. 3 is a schematic flowchart of a method for testing a soft handoff performance of a vehicle and a ground according to an embodiment of the present application;
fig. 4 is a schematic flow chart of a method for testing a soft handoff performance of a vehicle and a ground according to an embodiment of the present application.
Detailed Description
The scheme in the embodiments provided in the present application will be described below with reference to the drawings in the present application.
The terms "first" and "second" in the embodiments of the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
Some technical terms referred to in the embodiments of the present application will be first described.
The principle of soft handoff is to connect with a new base station and then disconnect from the original base station without interrupting the connection with the original base station. When the mobile phone is switched over, the soft switch does not disconnect the contact with the original base station, and simultaneously contacts with the new base station, and the contact with the original base station is disconnected after the mobile phone confirms to contact with the new base station, so that the call drop condition when the mobile phone enters a shielding area or a channel is busy and the like and cannot establish the contact with the new base station in the hard switch can be effectively reduced.
At present, the research on vehicle-ground soft handover mainly aims at improving various indexes such as time delay, success rate and the like of soft handover, but the research on testing of vehicle-ground soft handover is lacked, and various performance indexes in the vehicle-ground soft handover cannot be obtained quickly, so that the performance of various vehicle-ground soft handover methods cannot be evaluated.
In view of this, the present application provides a system for testing vehicle-ground soft handover performance, where the system includes a vehicle-mounted device, a first ground device, a second ground device, and a testing device, the vehicle-mounted device is configured to establish a first link with the first ground device, and establish a second link with the second ground device by adjusting an analog channel matrix, and after the second link is established, disconnect the first link, and the testing device is configured to test the performance of soft handover according to information sent by the vehicle-mounted device through the first link and information sent by the second link. The system can rapidly acquire various performance indexes in the vehicle-ground soft handoff, so that various vehicle-ground soft handoff methods are evaluated, and the development of related technologies is promoted.
In some possible implementation manners, the scheme in the application can be used in the research on the vehicle-ground high-speed soft switching performance, and the vehicle-ground soft switching performance under the high-speed magnetic suspension scene is evaluated, so that the development of the vehicle-ground soft switching under the high-speed magnetic suspension scene is facilitated.
For convenience of understanding, the system for testing the soft handoff performance of the vehicle and the ground provided by the embodiment of the application is described below with reference to the accompanying drawings.
Referring to fig. 1, the system 100 includes an on-board device 102, a first surface device 104, a second surface device 106, and a testing device 108. The vehicle-mounted equipment is connected with the first ground equipment and the second ground equipment through the analog channel matrix.
The in-vehicle device 102 establishes a second link with the second ground device 106 by adjusting the analog channel matrix after the first link is established by the first ground device 104, and disconnects the first link by adjusting the analog channel matrix after the second link is established.
In some possible implementations, the in-vehicle device 102 may include an analog in-vehicle service host and an analog in-vehicle communication device, the ground devices include a ground communication device and a zone control device, and the in-vehicle communication device is connected with the first ground communication device through an analog channel matrix.
Before the test is started, simulating a vehicle-mounted service host to configure an IP address and calibrate network time, wherein the configured IP address is used for distinguishing information sent by other hosts, and the calibrated network time is used for guaranteeing the accuracy of obtaining subsequent time delay and switching time delay. Meanwhile, the simulated vehicle-mounted service host starts network performance testing software (such as iperf and qperf) and network packet analysis software (such as wireshark) in advance for testing network performance and analyzing data. Simulating the vehicle-mounted service host and starting a wireshark interception function for filtering and intercepting a User Datagram Protocol (UDP) data packet. UDP is a method for transmitting a packet of an encapsulated IP address without establishing a connection, and is used to transmit an IP packet. The in-vehicle device 102 establishes stable communication to the first ground device 104 through the first link and performs the next test after a period of stable communication (typically 30 s).
The in-vehicle device 102 transmits the first data packet to the first ground device 104 through the first link. The first data packet may be a simulation service data packet including the first link characteristic, for example, the first data packet may be a simulation service data packet including a transmission time, and the simulation service data packet has the same structure as the real service data packet. Specifically, a data packet is sent from the simulated vehicle-mounted service host to the vehicle-mounted communication device, the vehicle-mounted communication device receives the data packet and then sends the data packet to a Media Access Control (MAC) layer, and the MAC layer sends the data packet to the first ground communication device through a cable and an attenuator.
And after receiving the data packet, the MAC layer of the first ground communication equipment forwards the data packet to the first partition control equipment.
And after the first link is stable, the vehicle-mounted communication equipment establishes a second link with the second ground communication equipment by adjusting the analog channel matrix, and sends second data to the second ground communication equipment through the second link. Wherein the second data may be a simulated service data packet comprising a second link characteristic for distinguishing from the simulated service data packet in the first link. And after the data packet is sent from the simulation service host, the data packet reaches the second ground communication equipment through the second link by the vehicle-mounted communication equipment. And after receiving the data packet, the second ground communication equipment sends the data packet to the second partition control equipment. The in-vehicle communication device then disconnects the first link with the first terrestrial communication device by adjusting the analog channel matrix, thereby effecting a soft handoff from the first terrestrial device 104 to the second terrestrial device 106.
The test device 108 tests the performance of the soft handover according to the reception information of the first data packet transmitted by the in-vehicle device 102 to the first ground device 104 through the first link and the reception information of the second data packet transmitted by the second link to the second ground device 106.
The test equipment 108 may be a host computer or a server. Specifically, the test device 108 records the packet receiving condition of the first data packet in the network performance test software and the network packet analysis software, and obtains the packet loss rate through the first link. Similarly, the test device 108 records the packet receiving condition of the second data packet through software, and obtains the packet loss rate through the second link. Further, the test device 108 obtains a test index representing the soft handover performance according to the receiving time of the first data packet and the receiving time of the second data packet.
In some possible implementations, after the second link between the vehicle-mounted device 102 and the second ground device 106 is established and before the first link is disconnected, the first ground device 104 receives a first data packet sent by the vehicle-mounted device 102 through the first link, and the receiving time of the first data packet is used for representing the starting time of the soft handover.
When the first link is disconnected, the second ground device 106 receives a second data packet sent by the vehicle-mounted device 102 through the second link, and the receiving time of the second data packet is used for representing the time when the soft handoff is completed.
The test equipment 108 determines the handoff delay based on the time when the soft handoff begins and the time when the soft handoff is completed. The switching time delay refers to the time required from the time of starting switching to the time of finishing switching, namely the time required for the vehicle-mounted communication equipment and the ground communication equipment to be switched to establish connection with the vehicle-mounted communication equipment and disconnect from the original ground communication equipment, and the switching time delay is a main test index for reflecting the soft switching performance.
Likewise, the test equipment 108 may determine the traffic delay jitter based on the reception time of two adjacent data packets. The service delay jitter may characterize the impact of soft handoff on the service from a service perspective.
Thus, by providing a system for switching the first link between the vehicle-mounted device 102 and the first ground device 104 to the second link between the vehicle-mounted device and the second ground device 106 through soft switching, the test on the vehicle-ground soft switching performance can be realized, and various indexes of response performance in different vehicle-ground soft switching methods can be quickly obtained, so that the performance of different methods can be evaluated, and the development of the vehicle-ground soft switching technology is facilitated.
Further, the method and the device can also be used in a scene architecture of a test system for the soft handoff performance of the vehicle and the ground as shown in fig. 2.
The scene vehicle-mounted equipment comprises a simulation service host A, a simulation service host B, vehicle-mounted communication equipment A and vehicle-mounted communication equipment B, wherein the simulation service host and the vehicle-mounted communication equipment are both in redundant deployment, and the stability of the vehicle-mounted equipment is guaranteed.
The ground equipment comprises ground communication equipment A, ground communication equipment B, ground communication equipment C, ground communication equipment D, zone control equipment A, zone control equipment B and zone control equipment C. Wherein, a plurality of ground communication devices can be connected with one zone control device to control. In this embodiment, the zone control device a is connected to the ground communication device a and the ground communication device B, and the zone control device B is connected to the ground communication device C and the ground communication device D. The ground communication equipment can be connected to the optical ring network and connected with the zone control equipment through the switch.
The test equipment is respectively connected with the partition control equipment A, the partition control equipment B and the partition control equipment C. The test device may include a core network switch, a core network control device, a simulation a network core network server, and a simulation B network core network server. The core network control equipment is respectively connected with the core network server of the simulation A network and the core network server of the simulation B network, and then is connected with the partition control equipment A, the partition control equipment B and the partition control equipment C through the core network switch.
The ground communication equipment is connected with the vehicle-mounted communication equipment through the analog channel matrix, and different soft switching scenes are simulated by adjusting the analog channel matrix.
The testing process is shown in fig. 3, and the testing process specifically includes the following steps.
S302: and completing preparation work before testing.
The pre-test preparation may include connecting the devices according to a scenario diagram as shown in fig. 2. In some possible implementations, the preparation before the test further includes configuring an IP address of the device, and different IP addresses may distinguish different devices, so as to facilitate obtaining the performance data. Optionally, the preparation work may also include calibrating the network time for each host and server, so as to unify the time of each device, thereby improving the accuracy of calculating the switching performance. The host and the server start jperf and wireshark software, can directly acquire performance data according to a data packet, start a wireshark interception function and filter the data packet.
And the simulation service host A opens a UDP service flow to the simulation core network server, establishes stable communication and then carries out the next test.
S304: and recording the packet receiving condition of the data packet from the simulated vehicle-mounted service host A to the simulated core network server.
Specifically, a data packet sequentially passes through the vehicle-mounted communication device, the ground communication device, the partition control device and the core network switch from the simulated vehicle-mounted service host A to reach the simulated core network server, and the core network server records packet receiving conditions at jperf and wireshark and counts packet loss rate.
In some possible implementation manners, the time of the step lasts at least 200s, after the test is finished, a statistical result of the packet loss rate is directly obtained according to jperf, and the statistical difference is compared with the statistical result according to the packet receiving condition derived by simulating the wireshark of the vehicle-mounted service host and the core network server, so that the time delay is obtained, and the stability of the time delay is further obtained. Further, whether the time delay stability of the method meets the requirement or not is judged according to a preset time delay boundary.
S306: and simulating the same-frequency switching in the same communication subarea by adjusting the analog channel matrix.
After the vehicle-mounted communication equipment A and the ground communication equipment A are connected through the first link, the analog channel matrix is adjusted, so that the attenuation value between the vehicle-mounted communication equipment A and the ground communication equipment B is reduced, and the second link connection can be established. At the moment, the data packet still passes through the ground communication equipment A, the partition control equipment A and the core network switch from the vehicle-mounted communication equipment A to the simulation core network server in sequence, and the time T of the data packet arriving at the simulation core network server is recorded1。
And continuously adjusting the analog channel matrix to increase the attenuation value between the vehicle-mounted communication equipment A and the ground communication equipment A until the first link connection is disconnected. At this time, the soft handover of the vehicle-mounted communication equipment A from the ground communication equipment A to the ground communication equipment B is completed, the data packet sequentially passes through the ground communication equipment B, the zone control equipment A and the core network switch from the vehicle-mounted communication equipment A to reach the simulation core network server, and the time T of the data packet reaching the simulation core network server is recorded2。
Calculating the time delta t needed for obtaining the same-frequency switching in the same communication subarea1＝T2-T1. Simultaneously observing service delay jitter and recordingCurrent maximum delay jitter value tj1。
S308: and simulating the same-frequency switching in different communication partitions by adjusting the analog channel matrix.
After the vehicle-mounted communication equipment A and the ground communication equipment B are connected through the second link, the analog channel matrix is adjusted, so that the attenuation value between the vehicle-mounted communication equipment A and the ground communication equipment C is reduced, and the third link connection can be established. At the moment, the data packet still passes through the ground communication equipment B, the zone control equipment A and the core network switch from the vehicle-mounted communication equipment A to the simulation core network server in sequence, and the time T of the data packet arriving at the simulation core network server is recorded3。
And continuously adjusting the analog channel matrix to increase the attenuation value between the vehicle-mounted communication equipment A and the ground communication equipment B until the second link connection is disconnected. At this time, the soft handoff of the vehicle-mounted communication equipment A from the ground communication equipment B to the ground communication equipment C is completed, the data packet sequentially passes through the ground communication equipment C, the zone control equipment B and the core network switch from the vehicle-mounted communication equipment A to reach the simulation core network server, and the time T of the data packet reaching the simulation core network server is recorded4。
Calculating the time delta t required for obtaining the same-frequency switching in different communication partitions2＝T4-T3. Simultaneously observing service time delay jitter, and recording the current maximum time delay jitter value tj2。
S310: and by adjusting the analog channel matrix, the pilot frequency switching in the same communication partition is simulated.
After the vehicle-mounted communication equipment A and the ground communication equipment C are connected through the third link, the analog channel matrix is adjusted, so that the attenuation value between the vehicle-mounted communication equipment A and the ground communication equipment D is reduced, and the fourth link connection can be established. At the moment, the data packet still passes through the ground communication equipment C, the zone control equipment B and the core network switch from the vehicle-mounted communication equipment A to the simulation core network server in sequence, and the time T of the data packet arriving at the simulation core network server is recorded5。
And closing the ground communication equipment C to form the pilot frequency switching condition. At this time, the vehicle-mounted communication equipment A senses the ground communication equipment C according to the sensingWhen the data packet fails, the soft switching is completed, the data packet sequentially passes through the ground communication equipment D, the zone control equipment B and the core network switch from the vehicle-mounted communication equipment A to reach the simulation core network server, and the time T of the data packet reaching the simulation core network server is recorded6。
Calculating the time delta t required for obtaining the same-frequency switching in different communication partitions3＝T6-T5. Simultaneously observing service time delay jitter, and recording the current maximum time delay jitter value tj3。
Therefore, the vehicle-ground soft switching performance test method and the vehicle-ground soft switching performance test device can realize comparison and evaluation of the vehicle-ground soft switching performance in different methods. Furthermore, the scheme also provides three scenes of soft handover, namely same-frequency handover in the same communication zone, same-frequency handover in different communication zones and pilot-frequency handover in the same communication zone, and the soft handover test performance indexes under the three scenes are tested, so that the vehicle-ground soft handover performance can be accurately evaluated, and the development of the vehicle-ground wireless soft handover technology is facilitated.
Corresponding to the above system embodiment, the present application further provides a method for testing performance of soft handoff between a vehicle and a ground, and the method is described with reference to the accompanying drawings.
Referring to fig. 4, a flow chart of a method for testing the performance of soft handoff of the vehicle with the ground is shown, and the method comprises the following steps.
S402: after the first link is established with the first ground equipment, the vehicle-mounted equipment establishes a second link with the second ground equipment by adjusting the analog channel matrix, and after the second link is established, the first link is disconnected by adjusting the analog channel matrix.
S404: the first ground equipment receives a first data packet sent by the vehicle-mounted equipment through a first link.
In some possible implementations, the first data packet and the second data packet include a simulation service data packet, and the simulation service data packet has the same structure as the real service data packet.
In some possible implementations, the receiving, by the first ground device, the first data packet sent by the vehicle-mounted device through the first link includes:
when the second link is established between the vehicle-mounted equipment and the second ground equipment, the first ground equipment receives a first data packet sent by the vehicle-mounted equipment through the first link, and the receiving time of the first data packet is used for representing the soft handover starting time.
S406: and the second ground device receives a second data packet sent by the vehicle-mounted device through a second link.
The second data packet sent by the vehicle-mounted device through the second link is received by the second ground device, and the second data packet comprises:
when a first link between the vehicle-mounted equipment and the first ground equipment is disconnected, the second ground equipment receives a second data packet sent by the vehicle-mounted equipment through the second link, and the receiving time of the second data packet is used for representing the soft handover completion time;
s408: and the test equipment tests the performance of the soft handover according to the receiving information of the first data packet and the receiving information of the second data packet.
And the test equipment determines the switching time delay according to the receiving time of the first data packet and the receiving time of the second data packet.
In some possible implementations, the soft handover performance includes service delay jitter, and the testing device tests the soft handover performance according to the reception information of the first data and the reception information of the second data, where the testing device tests the soft handover performance includes:
and determining service delay jitter according to the receiving time of two adjacent data packets.
In some possible implementations, the first and second ground devices are located in the same communications zone.
In some possible implementations, the first and second ground devices are located in different communication zones.
In some possible implementations, the frequency of the first link and the frequency of the second link are different.
The application provides a device for realizing a method for testing vehicle-ground soft handover performance. The apparatus includes a processor and a memory. The processor and the memory communicate with each other. The processor is used for executing the instructions stored in the memory so as to enable the equipment to execute the testing method of the vehicle-ground soft handoff performance.
The application provides a computer-readable storage medium, in which instructions are stored, which, when run on a device, cause the device to perform the above-mentioned method for testing the soft-switching performance of the vehicle.
A computer program product containing instructions is provided which, when run on an apparatus, causes the apparatus to perform the above-described method of testing soft-handoff performance of a vehicle.
It should be noted that the above-described embodiments of the apparatus are merely schematic, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiments of the apparatus provided in the present application, the connection relationship between the modules indicates that there is a communication connection therebetween, and may be implemented as one or more communication buses or signal lines.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present application can be implemented by software plus necessary general-purpose hardware, and certainly can also be implemented by special-purpose hardware including special-purpose integrated circuits, special-purpose CPUs, special-purpose memories, special-purpose components and the like. Generally, functions performed by computer programs can be easily implemented by corresponding hardware, and specific hardware structures for implementing the same functions may be various, such as analog circuits, digital circuits, or dedicated circuits. However, for the present application, the implementation of a software program is more preferable. Based on such understanding, the technical solutions of the present application may be substantially embodied in the form of a software product, which is stored in a readable storage medium, such as a floppy disk, a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, an exercise device, or a network device) to execute the method according to the embodiments of the present application.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.
The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, training device, or data center to another website site, computer, training device, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can store or a data storage device, such as a training device, a data center, etc., that incorporates one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
Claims (10)
1. A system for testing soft-handoff performance of a vehicle, the system comprising: the system comprises vehicle-mounted equipment, first ground equipment, second ground equipment and test equipment;
the vehicle-mounted equipment is used for establishing a second link with the second ground equipment by adjusting an analog channel matrix after establishing a first link with the first ground equipment, and disconnecting the first link by adjusting the analog channel matrix after establishing the second link;
the first ground equipment is used for receiving a first data packet sent by the vehicle-mounted equipment through the first link;
the second ground device is configured to receive a second data packet sent by the vehicle-mounted device through the second link;
the test equipment is used for testing the soft handover performance according to the receiving information of the first data packet and the receiving information of the second data packet.
2. The system of claim 1, wherein the first data packet and the second data packet comprise a dummy service data packet, and wherein the dummy service data packet has the same structure as a real service data packet.
3. The system of claim 1, wherein the first surface device is specifically configured to:
when the vehicle-mounted equipment and the second ground equipment establish a second link, receiving a first data packet sent by the vehicle-mounted equipment through the first link, wherein the receiving time of the first data packet is used for representing the starting time of soft handover;
the second ground device is specifically configured to:
when the first link between the vehicle-mounted equipment and the first ground equipment is disconnected, receiving a second data packet sent by the vehicle-mounted equipment through the second link, wherein the receiving time of the second data packet is used for representing the soft handover completion time;
the soft handover performance includes a handover delay, and the test device is specifically configured to:
and determining the switching time delay according to the receiving time of the first data packet and the receiving time of the second data packet.
4. The system of claim 1, wherein the soft handover performance includes service delay jitter, and the testing device is specifically configured to:
and determining service delay jitter according to the receiving time of two adjacent data packets.
5. The system of claim 1, wherein the first surface device and the second surface device are located in a same communications zone.
6. The system of claim 1, wherein the first ground device and the second ground device are located in different communication zones.
7. The system according to any of claims 1 to 6, wherein the frequency of the first link and the frequency of the second link are different.
8. A performance test method for soft handoff between a vehicle and a ground is characterized by comprising the following steps:
after establishing a first link with the first ground equipment, the vehicle-mounted equipment establishes a second link with second ground equipment by adjusting an analog channel matrix, and after establishing the second link, disconnects the first link by adjusting the analog channel matrix;
the first ground equipment receives first data sent by the vehicle-mounted equipment through the first link;
the second ground equipment receives second data sent by the vehicle-mounted equipment through the second link;
and the test equipment tests the performance of the soft handover according to the receiving information of the first data and the receiving information of the second data.
9. An apparatus, comprising a processor and a memory;
the processor is configured to execute instructions stored in the memory to cause the device to perform the method of claim 8.
10. A computer-readable storage medium comprising instructions that direct a device to perform the method recited in claim 8.
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| CN202110615444.6A CN113347604A (en) | 2021-06-02 | 2021-06-02 | System, method, equipment and medium for testing vehicle-ground soft switching performance |
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Application publication date: 20210903 |